Fluoride Variations in Rivers on the Slopes of Mount Meru in Tanzania

Table 1

Isotopic signatures of δ¹⁸O and δ²H from the LGR-ICOS laser process analyzer of water in the four rivers.

Temi River			Nduruma River			Tengeru River			Maji ya Chai River
Point name	δ^2H	δ^18O	Point name	δ^2H	δ^18O	Point name	δ^2H	δ^18O	Point name	δ^2H	δ^18O
Prec.	−28.97	−6.16	Prec.	−28.96	−6.25	Prec.	−28.35	−6.22	Prec.	−28.41	−6.21
Te1	−24.71	−5.08	N1	−28.54	−5.80	T3	−21.95	−4.84	M1	−21.68	−4.68
Te5	−22.31	−4.70	N6	−24.83	−5.22	T8	−21.36	−4.69	M3	−20.12	−4.58
Te6	−20.36	−4.45	N9	−20.59	−4.60	T9	−20.85	−4.57	M5	−19.11	−4.20
Te9	−17.42	−3.77	N10	−19.24	−4.25	T19	−19.70	−4.40	M6	−16.14	−3.62
Te10	−14.50	−3.01	N12	−18.04	−3.99	T21	−18.58	−4.24	M7	−14.85	−3.28

Note. Te: Temi River; N: Nduruma River; T: Tengeru River; M: Maji ya Chai River; Prec.: precipitation; δ²H = and δ¹⁸O = , where are isotopic values from the table.